<template>
    <div>
        <!-- 面包屑导航区域 -->
        <el-breadcrumb separator-class="el-icon-arrow-right">
          <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
          <el-breadcrumb-item>商品管理</el-breadcrumb-item>
          <el-breadcrumb-item>商品列表</el-breadcrumb-item>
        </el-breadcrumb>

        <!-- 卡片视图区域 -->
        <el-card>
            <el-row :gutter="20">
            <el-col :span="8">  
                <el-input placeholder="请输入内容" v-model="queryInfo.query" clearable @clear="getGoodsList">
                    <el-button slot="append" icon="el-icon-search" @click="getGoodsList"></el-button>
                </el-input>
            </el-col>
            <el-col :span="4">
                <el-button type="primary" @click="goAddpage">添加商品</el-button>
            </el-col>
            </el-row>

            <!-- table表格区域 -->
            <el-table :data="goodslist" border stripe>
            <!-- 索引列 -->
            <el-table-column label="#" type="index"></el-table-column>
            <el-table-column label="商品名称" prop="goods_name"></el-table-column>
            <el-table-column label="商品价格(元)" prop="goods_price" width="95px"></el-table-column>
            <el-table-column label="商品重量" prop="goods_weight" width="70px"></el-table-column>

            <el-table-column label="创建时间" prop="add_time" width="160px">
                <template slot-scope="scope">
                    {{scope.row.add_time | dateFormat}}
                </template>
            </el-table-column>

            <el-table-column label="操作" width="130px">
                <template slot-scope="scope">
                    <el-button type="primary" icon="el-icon-edit" size="mini"></el-button>
                    <el-button type="danger" icon="el-icon-delete" size="mini" @click="removeById(scope.row.goods_id)"></el-button>
                </template>
            </el-table-column>
            </el-table>

            <!-- 分页区域 -->
            <el-pagination
                @size-change="handleSizeChange"
                @current-change="handleCurrentChange"
                :current-page="queryInfo.pagenum"
                :page-sizes="[5, 10, 15, 20]"
                :page-size="queryInfo.pagenum"
                layout="total, sizes, prev, pager, next, jumper"
                :total="total"
                background
                >
            </el-pagination>
        </el-card>
    </div>
</template>

<script>
export default {
    data(){
        return{
            // 请求商品列表数据的请求参数
            queryInfo:{
                query:'', // 当前查询的字符
                pagenum:1, // 当前页码
                pagesize:10 // 每页显示条数
            },
            // 商品列表所有数据
            goodslist:[],
            // 总数据条数
            total:0
        }
    },
    created(){
        this.getGoodsList()
    },
    methods:{
        // 获取商品列表数据
        async getGoodsList(){
            const {data:res} = await this.$http.get('goods',{params:this.queryInfo})
            if(res.meta.status !== 200) {
                return $this.message.error('获取商品列表失败！')
            }
            this.goodslist = res.data.goods
            this.total = res.data.total
        },
        // pagesize发生改变事件处理函数
        handleSizeChange(newSize) {
            this.queryInfo.pagesize = newSize // 把最新的pagesize赋值给请求参数
            this.getGoodsList() // 发起请求刷新列表
        },
        handleCurrentChange(newPage) {
            this.queryInfo.pagenum = newPage // 把最新的页码值赋值给请求参数
            this.getGoodsList() // 发起请求刷新列表
        },
        // 删除按钮事件
        async removeById(id) {
            const confirmResult = await this.$confirm('此操作将永久删除该商品, 是否继续?', '提示', {
                confirmButtonText: '确定',
                cancelButtonText: '取消',
                type: 'warning' 
            }).catch(err=>{
                return err
            })

            if(confirmResult !== 'confirm') {
                return this.$message.info('已经取消删除')
            }
            const {data:res} = await this.$http.delete(`goods/${id}`)
            if(res.meta.status !== 200) {
                return this.$message.error('删除失败！')
            }
            this.$message.success('删除成功')
            this.getGoodsList()
        },
        // 添加商品按钮的点击事件
        goAddpage() {
            this.$router.push('/goods/add')
        }
    }
}
</script>

<style lang="less" scoped>

</style>